iommu/io-pgtable: Move some initialization data to .init.rodata

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The memory used by '__init' functions can be freed once the initialization
phase has been performed.

Mark some 'static const' array defined and used within some '__init'
functions as '__initconst', so that the corresponding data can also be
discarded.

Without '__initconst', the data are put in the .rodata section.
With the qualifier, they are put in the .init.rodata section.

With gcc 8.3.0, the following changes have been measured:

Without '__initconst':
   section      size
  .rodata       00000720
  .init.rodata  00000018

With '__initconst':
   section      size
  .rodata       00000660
  .init.rodata  00000058

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Will Deacon <will@kernel.org>

...

This commit is contained in:

Christophe JAILLET 2019-09-09 22:19:19 +02:00 • committed by Will Deacon

parent 931a0ba638

commit 9062c1d0be

1 changed files with 3 additions and 3 deletions

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drivers/iommu/io-pgtable-arm.c

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